Telenetics 202T, MIU202T User manual

Document No. 49-0002-011 Rev. A

Installation, Operation & Diagnostics

for the

MIU202T

Industrial Grade, Bell 202T

Standalone Modem

Document No. 49-0002-011 Rev. A

Telenetics Corporation

ARC Electronics

800-926-0226

MIU202T Installation, Operation & Diagnostics Edition: April 4, 1998 Page 1

TABLE OF CONTENTS

1. STANDARDS .........................................................................................................2

2. PRODUCT OVERVIEW .......................................................................................3

3. GENERAL PRODUCT SPECIFICATIONS........................................................4

4. MODEM SPECIFICATIONS.................................................................................5

5. ANALOG LINE SPECIFICATIONS ....................................................................7

6. ANALOG MICROWAVE INTERFACE..............................................................8

7. POWER CONNECTIONS.....................................................................................10

.............................................................................................................................................

8. SERIAL DATA PORT PIN-OUT ........................................................................11

9. DIP SWITCH FUNCTIONS ................................................................................12

10. MODEM CONFIGURATION..............................................................................14

11. LED INDICATOR.................................................................................................15

12. OUTLINE DRAWING & MOUNTING..............................................................16

13. DIAGNOSTICS.....................................................................................................17

MIU202T Installation, Operation & Diagnostics Edition: April 4, 1998 Page 2

1. STANDARDS

Meets FCC Rules Part J, Subpart 15, Class A for radiated emissions.

MIU202T Installation, Operation & Diagnostics Edition: April 4, 1998 Page 3

2. PRODUCT OVERVIEW

The MIU202T is an industrial grade Bell202T modem for connection to

unconditioned and conditioned, voice grade, type 3002 two or four-wire leased

lines and metallic lines (eg; pilot wires). It can be powered from a wide range of

AC and DC power supplies, it is internally surge protected on both the power

and analog lines, and it will operate in temperatures from -40 to +85 deg C.

Internally, the MIU202T consists of a baseboard and a communication

module. The baseboard includes the power supply regulation and surge

protection. The communication module is a Telenetics™ Pony Express™

PE202T Modem Module.

The MIU202T is packaged specifically for the harsh environments found in

utility substations and industrial facilities. Though functionally similar to

commercial modems, the MIU202T includes special features that make it

particularly well suited for utility and industrial applications:

Environment: The MIU202T has been designed specifically for use in

harsh environments. In addition to an extended temperature

range (-40 to +85º C), the MIU202T includes surge, shock,

vibration, and safety features superior to those of

conventional commercial modems.

Power Supply: The MIU202T can be powered from a broad range of AC

and DC power supplies, such as an auxiliary supply (eg;

12VDC) from another piece of equipment, 125VDC from a

station battery or a standard 120VAC.

Industrial: The MIU is packaged in a rugged, compact, non-metallic

(ABS) enclosure. Designed for unmanned locations, the

MIUs do not include the array of pushbuttons and LEDs

normally associated with consumer-type modems.

Configuration is by dip switches. Standard industrial

connectors for data, analog and power interfaces allow

reliable interconnection to other industrial components.

MIU202T Installation, Operation & Diagnostics Edition: April 4, 1998 Page 4

3. GENERAL PRODUCT SPECIFICATIONS

Dimensions: 5.3 x 4.0 x 1.375 inches

Weight: 1 lb

Voltage Supply: Standard Model: 40 to 270VDC

40 to 270VAC, 50/60Hz

LV Model (Suffix “-LV”): 9 to 36VDC

Current Requirements:

12VDC 24VDC 125VDC 120VAC 220VAC

65mA 27mA 7.5mA 6.5mA 5.5mA

Surge Protection: Power Supply: 8kVrms

Analog Line: 3.75kVac

Digital Line: ESD ± 10kV

Operating Temperature: -40 to +85 deg C

Operating Humidity: 0 to 90% (non-condensing.)

Storage Temperature: -55 to 100 deg C

MIU202T Installation, Operation & Diagnostics Edition: April 4, 1998 Page 5

4. MODEM SPECIFICATIONS

Modulation: Bell202T

Modulation Type: FSK

Synch/Async: Asynchronous Only

Data Rate: 0 – 1200bps

Transmit Frequency: Mark: 1200Hz

Space: 2200Hz

Error Correction: None

Data Compression: None

Data Modulation Connectivity: Using 16ms Polling Test

99.999% or better at -37dBm

99.5% or better at -40dBm

95% or better at -43dBm

Serial Formats and Flow Control:

Asynchronous and RTS/CTS flow control

Analog Interface

Tx Output Level: -0 dBm or -10 dBm *

Rx Sensitivity: -43dBm or -33dBm *

-43dBm for constant carrier

-40dBm for polling carrier

Line Termination: Dip Switch Selectable *

Line Impedance: 600 ohms balanced

2 or 4 Wire Configuration: Dip Switch Selectable *

MIU202T Installation, Operation & Diagnostics Edition: April 4, 1998 Page 6

Other Features

Receiver Equalization: Compromise Equalization

Self Test Diagnostics: None

Local Analog Loopback: See Section 13

Local Digital Loopback: See Section 13

Remote Analog Loopback See Section 13

Remote Digital Loopback See Section 13

Anti-Streaming: OFF or 45 Seconds (+ 5 sec) *

RTS/CTS delay: 1ms, 12ms, 35ms or 50ms (+5%) *

Note: Soft Carrier will effect RTS/CTS

delay time (see Dip Switch Settings ~

Section 8)

Constant Carrier Switch Selectable ON or OFF

Soft Carrier Turn Off 20ms of 900Hz after RTS is turned

Off

Carrier Turn ON/OFF 8ms +0.5ms

* Dip Switch Selectable ~ See Section 9

MIU202T Installation, Operation & Diagnostics Edition: April 4, 1998 Page 7

5. ANALOG LINE SPECIFICATIONS

The MIU202T contains analog circuitry for connection to the public conditioned or

unconditioned, Bell type 3002, 2 or 4-wire, full duplex voice grade leased lines or

metallic lines (eg; pilot wires). The MIU202T will also interface to Power Line

Carrier or Microwave radio voice channel networks.

The MIU202T has an RJ-11terminated connector. The following lists the

MIU202T analog interfaces

Analog Line Type:

Conditioned or unconditioned, Bell type 3002, 2 or 4-wire, full duplex voice grade or

metallic lines or better.

Analog Line Specifications:

Bandwidth 300 Hz to 3400 Hz (±3dB)

Impedance 600 / 900 ohms , balanced

Frequency Response 400 to 3000Hz (±2dB)

Receiver Input Level -16dBm max.

Output Level +7 dBm

Noise Signal Level -48 dBmO

MIU202T Installation, Operation & Diagnostics Edition: April 4, 1998 Page 8

6. ANALOG MICROWAVE INTERFACE

The MIU202Tis designed to interface to a Microwave radio voice channel network

with the following specifications:

Phase Jitter (10 to 300Hz)1 degree peak-to-peak, max.

Frequency Response: 300 - 3400Hz -3, +0.7 dB

400 - 3000Hz -1, +0.7 dB

600 - 2400Hz + 0.7 dB

Frequency Stability: With Synchronization 0.1 Hz

Without Synchronization 0.5 Hz / month

Level Stability (w/o regulation): + 0.5 dB (6 months)

Harmonic Distortion: 1% max, 0.3 % typical

(1Khz, 0 dBmO test tone)

Absolute Delay: Option – 001: 1500 µsec, maximum

Option – 002: 1900 µsec, maximum

Group Delay (option - 001): 600 - 3200 Hz 1200 µsec, maximum

800 - 2800 Hz 550 µsec, maximum

1000-2600 Hz 350 µsec, maximum

Group Delay (option - 002): 600 - 3200 Hz with 1000 µsec, maximum

800 - 2800 Hz with 400 µsec, maximum

1000-2600 Hz with 180 µsec, maximum

Linearity: 0.3 dB +3.5 dBmO

Limiting: +7.5dBmO, max (+6.5 dBmO typical)

for +20dBmO input

Crosstalk (intelligible)(1KhZ test tone at 0 dBmO):

Inter-channel 65 dBmO maximum, 80 dBmO typical

Intra-channel 70 dBmO maximum

MIU202T Installation, Operation & Diagnostics Edition: April 4, 1998 Page 9

Crosstalk (unintelligible):

Adjacent channel 28dBrnc0 maximum (24 455B weighted noise at 0

dBmO dBrnc0 typical).

Intra-channel 28 dBrnc0, maximum (18 dBrnc0, typical)

(1KHz test tone at 0 dBmO)

Out of Band Signalling: Frequency 3825 Hz

Level -20 dBmO

Pulse speed (30 to 80% break) 8 to 14 pps

Pulse distortion +3 dB, level var. 3% max.

Signaling leak -60 dBmO, maximum

MIU202T Installation, Operation & Diagnostics Edition: April 4, 1998 Page 10

7. POWER CONNECTIONS

MIU202T Installation, Operation & Diagnostics Edition: April 4, 1998 Page 11

8. SERIAL DATA PORT PIN-OUTS

MIU202T Installation, Operation & Diagnostics Edition: April 4, 1998 Page 12

9. DIP SWITCH FUNCTIONS

IMPORTANT NOTE: Invert modem to view dip switches as shown above

Table 1

Switch Function ON OFF

Switch 1 Transmit Analog (TxA) Signal Level 0 dBm -10 dBm

Switch 2 Anti-Streaming 45 secs OFF

Switch 3 Received Analog (RxA) Signal Level -33 dBm -43 dBm

Switch 4 RTS/CTS Delay See Table 2

Switch 5 RTS/CTS Delay See Table 2

Switch 6 Switched/Constant Carrier Constant

Carrier

Switched

Carrier

(Follows

RTS State)

Switch 7 2 or 4- Wire Selection 2-Wire 4-Wire

Switch 8 Line Termination 600 ohms None

(22kohms)

Switch 9 Soft Carrier (900Hz) Turn Off ON OFF

Switch 10 Spare

MIU202T Installation, Operation & Diagnostics Edition: April 4, 1998 Page 13

Table 2: RTS/CTS Delay Time

2

Wire

4

Wire

Switche

d

Carrie

r

Constan

t

Carrie

r

Switch

4

Switch

5

Switch 9

Soft

Carrier

RTS/CTS

Delay

Time

NO YES YES YES ON ON OFF 50 ms

YES NO YES NO ON ON ON 50 ms

NO YES YES NO ON ON ON 50 ms

YES NO YES NO ON ON OFF 50 ms

NO YES YES YES OFF ON OFF 35 ms

NO YES YES NO OFF ON ON 55 ms

YES NO YES NO OFF ON ON 35 ms

YES NO YES NO OFF ON OFF 35 ms

NO YES YES YES ON OFF OFF 12 ms

NO YES YES NO ON OFF ON 35 ms

YES NO YES NO ON OFF ON 12 ms

YES NO YES NO ON OFF OFF 12 ms

NO YES NO YES OFF OFF OFF 1 ms

NO YES YES NO OFF OFF OFF 12 ms

NO YES YES NO OFF OFF ON 32 ms

YES NO YES NO OFF OFF OFF 1 ms

YES NO YES NO OFF OFF ON 1 ms

MIU202T Installation, Operation & Diagnostics Edition: April 4, 1998 Page 14

10. MODEM CONFIGURATION

The following table provides the Dip Switch settings required for most modem

application configurations:

Dip Switch Setting

1 2 3 4 5 6 7 8 9

4-Wire

Point-to-Point

ON ON ON ON

4-Wire

Multi-Point

Master

ON ON ON ON

4-Wire

Multi-Point

Slave

Rx Term. OFF

ON ON ON ON ON

4-Wire

Multi-Point

Slave

Rx Term. ON

ON ON ON ON ON ON

2-Wire

Point-to-Point

ON ON ON ON ON ON ON

2-Wire

Multi-Point

Master

Line Term. ON

ON ON ON ON ON ON ON

2-Wire

Multi-Point

Slave

Line Term. ON

ON ON ON ON ON ON ON

2-Wire

Multi-Point

Slave

Line Term. OFF

ON ON ON ON ON ON

For clarity, a blank space = OFF

MIU202T Installation, Operation & Diagnostics Edition: April 4, 1998 Page 15

11. LED INDICATOR

MIU202T Installation, Operation & Diagnostics Edition: April 4, 1998 Page 16

12. OUTLINE DRAWING & MOUNTING

MIU202T Installation, Operation & Diagnostics Edition: April 4, 1998 Page 17

13. DIAGNOSTICS

The following pages provide hardware techniques for diagnosing communication

problems and thereby isolating the problem at the local modem, the remote

modem or the interconnecting line.

(a) LOCAL ANALOG LOOPBACK (Figure 2)

Requires a loop back cable with a built-in circuit for line loss to simulate a

typical leased line condition (See Figure 3).

Connect the loop back cable to the RJ11 connector on the modem under test.

Set Dip Switches as follows…

Switch 7 = OFF 4-Wire

Switch 9 = ON Soft Carrier Turn Off Enabled

Switch 1 = ON Transmit (TxA) Signal Level = 0dBm

Switch 3 = ON Receive (RxA) Signal Level = –33dBm

Switch 6 = OFF Switched Carrier

Switch 4&5 = ON RTS/CTS Delay = 50ms

Test 1: RTS/CTS Analog Control

Set RTS “ON” and check that CD (Carrier Detect) turns “ON”.

Turn RTS “OFF” and ensure that CD turns “OFF”

With RTS “ON”, run a test message at TxD and verify that the

same message is received at RxD with no data errors.

Test 2: Transmit Signal Power & Receive Levels

Set Dip Switch 1 OFF (TxA = -10dBm)

CD will be OFF.

Change Dip Switch 1 to ON (TxA = 0dBm)

CD should now be ON.

MIU202T Installation, Operation & Diagnostics Edition: April 4, 1998 Page 18

Test 3: Received Signal Level

Set Dip Switch 1 OFF (TxA = -10dBm) and Dip Switch 3 OFF

(RxA = -43dBm).

CD will be ON.

Run a test message at TxD and verify that the same message is

received at RxD with no data errors.

Test 4: Repeat Test 3 for various RTS/CTS delay times and with soft

carrier ON and OFF.

(b) LOCAL DIGITAL LOOPBACK – 4/Wire Network (Figure 4)

On the modem under test, connect TxD to RxD

Switch 1 = ON (TxA = 0dBm)

Switch 3 = ON (RxA = -33dBm)

Switch 4 = OFF (RTS/CTS = 35ms)

Switch 5 = ON (RTS/CTS = 35ms)

Switch 6 = ON (Constant Carrier mode).

Switch 7 = OFF (4-Wire)

Switch 8 = ON (Line Termination = 600 ohms)

Switch 9 = ON (Soft Carrier = ON)

Transmit a test message from a remote modem and confirm that the same

message is received back at RxD on the remote modem with no data errors.

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